Display device

ABSTRACT

A display device includes a 1-1st wiring including a 1-1st end at an end portion thereof in a first direction, a 1-2nd wiring extending in a second direction opposite to the first direction and including a 1-2nd end that is apart from the 1-1st end, a second wiring that is apart from the 1-1st wiring and the 1-2nd wiring, a first bridge wiring in contact with the 1-1st wiring and the 1-2nd wiring and electrically connecting the 1-1st wiring to the 1-2nd wiring, and a third wiring extending in the first direction and disposed such that the second wiring is between the 1-1st wiring and the third wiring. The first bridge wiring has a convex shape in a direction opposite to a direction from the 1-1st wiring and the 1-2nd wiring to the second wiring.

This application claims priority to Korean Patent Application No.10-2019-0174146, filed on Dec. 24, 2019, and all the benefits accruingtherefrom under 35 U.S.C. § 119, the content of which in its entirety isherein incorporated by reference.

BACKGROUND 1. Field

Exemplary embodiments relate to a display device, and more particularly,to a display device that may reduce the degree of occurrence of a colorband caused by external light reflection.

2. Description of Related Art

Generally, display devices are used under various environments.Therefore, the display devices may be used while an external lightsource is present. Particularly, in a case where the display devices areused in mobile apparatuses, there is a high possibility that the displaydevices are used under an environment in which external light isprovided.

SUMMARY

In a display device of a related art, external light is reflected by thedisplay device and a color band may be viewed.

Exemplary embodiments include a display device which may reduce a degreeof the occurrence of a color band by external light reflection. However,it should be understood that embodiments described herein should beconsidered in a descriptive sense only and not for limitation of theinvention.

Additional features will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented exemplary embodiments of theinvention.

An exemplary embodiment of a display device includes a 1-1^(st) wiringdisposed over a first insulating layer, extending in a first directionand including a 1-1^(st) end at an end portion thereof in the firstdirection, a 1-2^(nd) wiring disposed over the first insulating layer,extending in a second direction opposite to the first direction andincluding a 1-2^(nd) end that faces the 1-1^(st) end, the 1-2′ end beingapart from the 1-1^(st) end, a second wiring disposed over the firstinsulating layer, extending in the first direction and corresponding tothe 1-1^(st) wiring and the 1-2^(nd) wiring, the second wiring beingapart from the 1-1^(st) wiring and the 1-2^(nd) wiring, a first bridgewiring disposed on a layer different from the first insulating layer,contacting the 1-1^(st) wiring and the 1-2^(nd) wiring, electricallyconnecting the 1-1^(st) wiring to the 1-2^(nd) wiring, and having aconvex shape in a direction opposite to a direction from the 1-1^(st)wiring and the 1-2^(nd) wiring to the second wiring, a third wiringdisposed over the first insulating layer such that the second wiring isbetween the third wiring and 1-1^(st) wiring, the third wiring extendingin the first direction and corresponding to the 1-1^(st) wiring and the1-2^(nd) wiring, a first pixel electrode including a first side disposedabove the second wiring and a second side disposed above a space betweenthe 1-1^(st) end and the 1-2^(nd) end, and a second pixel electrodeincluding a first side disposed above the third wiring and a second sidedisposed above a space between the second wiring and the third wiring.

In an exemplary embodiment, the first pixel electrode may beelectrically connected to the second wiring, and the second pixelelectrode may be electrically connected to the third wiring.

In an exemplary embodiment, the display device may further include a2-1^(st) insulating layer covering the 1-1^(st) wiring, the 1-2^(nd)wiring, the second wiring, and the third wiring, and a 2-2^(nd)insulating layer over the 2-1^(st) insulating layer, wherein the firstbridge wiring may be between the 2-1^(st) insulating layer and the2-2^(nd) insulating layer.

In an exemplary embodiment, a 2-1^(st) via hole and a 3-1^(st) via holemay be defined in the 2-1^(st) insulating layer, the 2-1^(st) via holebeing defined over the second wiring, the 3-1^(st) via hole beingdefined over the third wiring, a 2-2^(nd) via hole and a 3-2^(nd) viahole may be defined in the 2-2^(nd) insulating layer, the 2-2^(nd) viahole corresponding to the 2-1^(st) via hole, the 3-2^(nd) via holecorresponding to the 3-1^(st) via hole, the first pixel electrode may bein contact with the second wiring through the 2-1^(st) via hole and the2-2^(nd) via hole, and the second pixel electrode may be in contact withthe third wiring through the 3-1^(st) via hole and the 3-2^(nd) viahole.

In an exemplary embodiment, the display device may further include asubstrate over which the first insulating layer may be arranged, whereinan orthogonal projection image of the first pixel electrode on thesubstrate may not overlap an orthogonal projection image of the firstbridge wiring on the substrate. An orthogonal projection image of thesecond pixel electrode on the substrate does not overlap an orthogonalprojection image of the second wiring on the substrate.

In an exemplary embodiment, the display device may further include asecond insulating layer covering the 1-1^(st) wiring, the 1-2^(nd)wiring, the second wiring, and the third wiring, wherein the firstbridge wiring, the first pixel electrode, and the second pixel electrodemay be arranged over the second insulating layer such that the firstbridge wiring, the first pixel electrode, and the second pixel electrodedo not contact one another.

In an exemplary embodiment, a second via hole defined over the secondwiring and a third via hole defined over the third wiring may be definedin the second insulating layer, the first pixel electrode may be incontact with the second wiring through the second via hole, and thesecond pixel electrode may be in contact with the third wiring throughthe third via hole.

In an exemplary embodiment, the display device may further include asubstrate over which the first insulating layer is arranged, wherein anorthogonal projection image of the first pixel electrode on thesubstrate may not overlap an orthogonal projection image of the firstbridge wiring on the substrate, and an orthogonal projection image ofthe second pixel electrode on the substrate may not overlap anorthogonal projection image of the second wiring on the substrate.

An exemplary embodiment of a display device includes a first wiringdisposed over a first insulating layer and extending in a firstdirection, a second wiring disposed over the first insulating layer andextending in the first direction and corresponding to the first wiring,the second wiring being apart from the first wiring, a 3-1^(st) wiringdisposed over the first insulating layer such that the second wiring isbetween the 3-1^(st) wiring and the first wiring, the 3-1^(st) wiringextending in the first direction and including a 3-1^(st) end at an endportion thereof in the first direction, a 3-2^(nd) wiring disposed overthe first insulating layer, extending in a second direction opposite tothe first direction and including a 3-2^(nd) end that faces the 3-1^(st)end, the 3-2^(nd) end being apart from the 3-1^(st) end, a third bridgewiring disposed over a layer different from the first insulating layer,contacting the 3-1^(st) wiring and the 3-2^(nd) wiring, electricallyconnecting the 3-1^(st) wiring to the 3-2^(nd) wiring, and having aconvex shape in a direction opposite to a direction from the 3-1^(st)wiring and the 3-2^(nd) wiring to the second wiring, a first pixelelectrode including a first side disposed above the second wiring and asecond side above the first wiring, and a second pixel electrodeincluding a first side above a space between the 3-1^(st) end and the3-2^(nd) end, and a second side above a space between the second wiringand a center of the space between the 3-1^(st) end and the 3-2^(nd) end.

In an exemplary embodiment, the first pixel electrode may beelectrically connected to one of the first wiring and the second wiring,and the second pixel electrode may be electrically connected to thethird bridge wiring.

In an exemplary embodiment, the display device may further include a2-1^(st) insulating layer covering the first wiring, the second wiring,the 3-1^(st) wiring, and the 3-2^(nd) wiring, and a 2-2^(nd) insulatinglayer over the 2-1^(st) insulating layer, wherein the third bridgewiring may be between the 2-1^(st) insulating layer and the 2-2^(nd)insulating layer.

In an exemplary embodiment, a 2-1^(st) via hole may be defined in the2-1^(st) insulating layer over the second wiring, a 2-2^(nd) via holeand a third via hole may be defined in the 2-2^(nd) insulating layer,the 2-2^(nd) via hole corresponding to the 2-1^(st) via hole, the thirdvia hole being defined over the third bridge wiring, the first pixelelectrode may be in contact with the second wiring through the 2-1^(st)via hole and the 2-2^(nd) via hole, and the second pixel electrode maybe in contact with the third bridge wiring through the third via hole.

In an exemplary embodiment, the display device may further include asubstrate over which the first insulating layer is arranged, wherein anorthogonal projection image of the second pixel electrode on thesubstrate may not overlap an orthogonal projection image of the thirdbridge wiring on the substrate.

In an exemplary embodiment, a virtual straight line connecting the3-1^(st) wiring to the 3-2^(nd) wiring may pass below the first side ofthe second pixel electrode.

An exemplary embodiment of a display device includes a 1-1^(st) wiringdisposed over a first insulating layer, extending in a first directionand including a 1-1^(st) end at an end portion thereof in the firstdirection, a 1-2^(nd) wiring disposed over the first insulating layer,extending in a second direction opposite to the first direction andincluding a 1-2^(nd) end that faces the 1-1^(st) end, the 1-2^(nd) endbeing apart from the 1-1^(st) end, a 2-1^(st) wiring disposed over thefirst insulating layer, being apart from the 1-1^(st) wiring and the1-2^(nd) wiring, extending in the first direction and including a2-1^(st) end at an end portion thereof in the first direction, a2-2^(nd) wiring disposed over the first insulating layer, extending inthe direction opposite to the first direction and including a 2-2^(nd)end that faces the 2-1^(st) end, the 2-2^(nd) end being apart from the2-1st end, a 3-1^(st) wiring disposed over the first insulating layersuch that the 2-1^(st) wiring is between the 3-1^(st) wiring and1-1^(st) wiring, 3-1^(st) wiring extending in the first direction andincluding a 3-1^(st) end at an end portion thereof in the firstdirection, a 3-2^(nd) wiring disposed over the first insulating layer,extending in the direction opposite to the first direction and includinga 3-2^(nd) end that faces the 3-1^(st) end, the 3-2^(nd) end being apartfrom the 3-1^(st) end, a first bridge wiring disposed over a layerdifferent from the first insulating layer, contacting the 1-1st wiringand the 1-2^(nd) wiring, electrically connecting the 1-1^(nd) wiring tothe 1-2^(nd) wiring, and having a convex shape in a direction oppositeto a direction from the 1-1^(st) wiring and the 1-2^(nd) wiring to the2-1^(st) wiring, a second bridge wiring disposed over a layer differentfrom the first insulating layer, contacting the 2-1^(st) wiring and the2-2^(nd) wiring, electrically connecting the 2-1^(st) wiring to the2-2^(nd) wiring, and having a convex shape to a direction opposite to adirection from the 2-1^(st) wiring and the 2-2^(nd) wiring to the1-1^(st) wiring, a third bridge wiring disposed over a layer differentfrom the first insulating layer, contacting the 3-1^(st) wiring and the3-2^(nd) wiring, electrically connecting the 3-1^(st) wiring to the3-2^(nd) wiring, and having a convex shape to a direction opposite to adirection from the 3-1^(st) wiring and the 3-2^(nd) wiring to the2-1^(st) wiring, a first pixel electrode including a first side disposedin a space between the 1-1^(st) end and the 1-2^(nd) end, and a secondside disposed in a space between the 2-1^(st) end and the 2-2^(nd) end,and a second pixel electrode including a first side disposed above aspace between the 3-1^(st) end and the 3-2^(nd) end, and a second sidedisposed above a space between the 2-1^(st) wiring and a center of thespace between the 3-1^(st) end and the 3-2^(nd) end, or disposed above aspace between the 2-2^(nd) wiring and the center of the space betweenthe 3-1′ end and the 3-2^(nd) end.

In an exemplary embodiment, the first pixel electrode may beelectrically connected to the second bridge wiring, and the second pixelelectrode may be electrically connected to the third bridge wiring.

In an exemplary embodiment, the display device may further include a2-1′ insulating layer covering the 1-1^(st) wiring, the 1-2^(nd) wiring,the 2-1^(st) wiring, the 2-2^(nd) wiring, the 3-1^(st) wiring, and the3-2^(nd) wiring, and a 2-2^(nd) insulating layer over the 2-1^(st)insulating layer, wherein the first bridge wiring to the third bridgewiring may be between the 2-1^(st) insulating layer and the 2-2^(nd)insulating layer.

In an exemplary embodiment, a second via hole and a third via hole maybe defined in the 2-2^(nd) insulating layer, the second via hole beingdefined over the second bridge wiring, the third via hole being definedover the third bridge wiring, the first pixel electrode may be incontact with the second bridge wiring through the second via hole, andthe second pixel electrode may be in contact with the third bridgewiring through the third via hole.

In an exemplary embodiment, the display device may further include asubstrate over which the first insulating layer is arranged, wherein anorthogonal projection image of the first pixel electrode on thesubstrate may not overlap an orthogonal projection image of the firstbridge wiring on the substrate and an orthogonal projection image of thesecond bridge wiring on the substrate, and an orthogonal projectionimage of the second pixel electrode on the substrate may not overlap anorthogonal projection image of the third bridge wiring on the substrate.

In an exemplary embodiment, a virtual straight line connecting the3-1^(st) wiring to the 3-2^(nd) wiring may pass below the first side ofthe second pixel electrode.

These and/or other features will become apparent and more readilyappreciated from the following description of the exemplary embodiments,the accompanying drawings, and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of exemplary embodiments ofthe invention will be more apparent from the following description takenin conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of an exemplary embodiment of a displaydevice;

FIG. 2 is a plan view of a portion of region A of FIG. 1 ;

FIG. 3 is a cross-sectional view taken along line of FIG. 2 ;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2 ;

FIG. 5 is a plan view of a comparative example of a portion of a displaydevice

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5 ;

FIGS. 7 and 8 are cross-sectional views of another exemplary embodimentof portions of a display device;

FIG. 9 is a plan view of a portion of another exemplary embodiment of adisplay device;

FIGS. 10 and 11 are cross-sectional views of another exemplaryembodiment of portions of a display device;

FIGS. 12 and 13 are cross-sectional views of another exemplaryembodiment of portions of a display device;

FIG. 14 is a plan view of a portion of another exemplary embodiment of adisplay device;

FIG. 15 is a cross-sectional view taken along line XV-XV of FIG. 14 ;

FIG. 16 is a plan view of another exemplary embodiment of a portion of adisplay device;

FIG. 17 is a plan view of another exemplary embodiment of a portion of adisplay device; and

FIG. 18 is a plan view of another exemplary embodiment of a portion of adisplay device.

DETAILED DESCRIPTION

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings, wherein like referencenumerals refer to like elements throughout. In this regard, theillustrated exemplary embodiments may have different forms and shouldnot be construed as being limited to the descriptions set forth herein.Accordingly, the exemplary embodiments are merely described below, byreferring to the drawing figures, to explain features of thedescription. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items. Throughoutthe invention, the expression “at least one of a, b or c” indicates onlya, only b, only c, both a and b, both a and c, both b and c, all of a,b, and c, or variations thereof.

Hereinafter, the illustrated exemplary embodiments are described indetail with reference to the accompanying drawings. In the drawings, thesame reference numerals are given to the same or corresponding elements,and repeated description thereof is omitted.

It will be understood that when a layer, region, or component isreferred to as being “disposed on,” another layer, region, or component,it can be directly or indirectly disposed on the other layer, region, orcomponent. That is, for example, intervening layers, regions, orcomponents may be present. Sizes of elements in the drawings may beexaggerated or reduced for convenience of explanation. In other words,since sizes and thicknesses of components in the drawings arearbitrarily illustrated for convenience of explanation, the followingembodiments are not limited thereto.

In the following examples, the x-axis, the y-axis and the z-axis are notlimited to three axes of the rectangular coordinate system, and may beinterpreted in a broader sense. The x-axis, the y-axis, and the z-axismay be perpendicular to one another, or may represent differentdirections that are not perpendicular to one another, for example.

It will be understood that, although the terms “first,” “second,”“third,” etc., may be used herein to describe various elements,components, regions, layers and/or sections, these elements, components,regions, layers and/or sections should not be limited by these terms.These terms are only used to distinguish one element, component, region,layer or section from another element, component, region, layer orsection. Thus, “a first element,” “component,” “region,” “layer” or“section” discussed below could be termed a second element, component,region, layer or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting. As used herein, thesingular forms “a,” “an,” and “the” are intended to include the pluralforms, including “at least one,” unless the content clearly indicatesotherwise. “Or” means “and/or.” As used herein, the term “and/or”includes any and all combinations of one or more of the associatedlisted items. It will be further understood that the terms “comprises”and/or “comprising,” or “includes” and/or “including” when used in thisspecification, specify the presence of stated features, regions,integers, steps, operations, elements, and/or components, but do notpreclude the presence or addition of one or more other features,regions, integers, steps, operations, elements, components, and/orgroups thereof.

“About” or “approximately” as used herein is inclusive of the statedvalue and means within an acceptable range of deviation for theparticular value as determined by one of ordinary skill in the art,considering the measurement in question and the error associated withmeasurement of the particular quantity (i.e., the limitations of themeasurement system). For example, “about” can mean within one or morestandard deviations, or within ±30%, 20%, 10%, 5% of the stated value.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and theinvention, and will not be interpreted in an idealized or overly formalsense unless expressly so defined herein.

Exemplary embodiments are described herein with reference to crosssection illustrations that are schematic illustrations of idealizedembodiments. As such, variations from the shapes of the illustrations asa result, for example, of manufacturing techniques and/or tolerances,are to be expected. Thus, embodiments described herein should not beconstrued as limited to the particular shapes of regions as illustratedherein but are to include deviations in shapes that result, for example,from manufacturing. In an exemplary embodiment, a region illustrated ordescribed as flat may, typically, have rough and/or nonlinear features.Moreover, sharp angles that are illustrated may be rounded. Thus, theregions illustrated in the figures are schematic in nature and theirshapes are not intended to illustrate the precise shape of a region andare not intended to limit the scope of the claims.

FIG. 1 is a perspective view of an exemplary embodiment of a displaydevice 1, FIG. 2 is a plan view of a portion of a region A of FIG. 1 ,FIG. 3 is a cross-sectional view of the display device 1 taken alongline of FIG. 2 , and FIG. 4 is a cross-sectional view of the displaydevice 1 taken along line IV-IV of FIG. 2 .

As shown in FIG. 1 , the display device 1 may include a display area DAand a peripheral area PA. The display device 1 may include a substrate100 (refer to FIGS. 3 and 4 ). The substrate 100 is not limited to arectangular shape (in an x-y plane) shown in FIG. 1 and may have variousshapes such as a circle. In an alternative exemplary embodiment, thesubstrate 100 may have a bent area and thus be bent in the relevant bentarea.

The substrate 100 may include glass or metal. In an exemplaryembodiment, the substrate 100 may include various flexible or bendablematerials and include, for example, a polymer resin such aspolyethersulfone, polyacrylate, polyetherimide, polyethylenenaphthalate, polyethylene terephthalate, polyphenylene sulfide,polyarylate, polyimide, polycarbonate, and cellulose acetate propionate.

As shown in FIGS. 3 and 4 , the substrate 100 may have a multi-layeredstructure including two layers 101 and 105 and a barrier layer 103therebetween, the two layers 101 and 105 including the polymer resin,and the barrier layer 103 including an inorganic material. Variousmodifications may be made. In this case, the barrier layer 103 mayinclude silicon oxide, silicon nitride, and/or silicon oxynitride, forexample.

As shown in FIG. 2 , the display device 1 may include various elementsarranged in the display area DA. It is shown in FIG. 2 that the displaydevice 1 includes a first wiring W1, a second wiring W2, a third wiringW3, a first bridge wiring BW1, a first pixel electrode PE1, and a secondpixel electrode PE2. The first wiring W1 includes a 1-1^(st) wiring W1-1and a 1-2^(nd) wiring W1-2. In addition, as shown in FIG. 2 , thedisplay device 1 may further include a fourth wiring W4 and a thirdpixel electrode PE3. Various modifications may be made.

The 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the second wiringW2, the third wiring W3, and the fourth wiring W4 are disposed over afirst insulating layer. The first insulating layer may include aninter-insulating layer 130 (refer to FIGS. 3 and 4 ). There may bevarious layers below the inter-insulating layer 130. In an exemplaryembodiment, a barrier layer 111 and a buffer layer 113 may be arrangedbelow the inter-insulating layer 130, for example. The barrier layer 111and the buffer layer 113 may include an inorganic material such assilicon oxide, silicon nitride, and/or silicon oxynitride. The barrierlayer 111 and the buffer layer 113 may raise the flatness of a topsurface of the substrate 100 or prevent or minimize the penetration ofimpurities from the substrate 100, etc., into an electronic elementdisposed thereon. The barrier layer 111 and the buffer layer 113 may becollectively referred to as an inorganic insulating layer 110.

A thin film transistor (“TFT”) may be disposed over the substrate 100,and the TFT may be electrically connected to the first pixel electrodePE1 and the second pixel electrode PE2. The TFT may include asemiconductor layer, a gate electrode, a source electrode, and a drainelectrode, the semiconductor layer including amorphous silicon,polycrystalline silicon, or an organic semiconductor material. Thesemiconductor layer may be disposed over the inorganic insulating layer110, and the gate electrode may be disposed over the semiconductorlayer. In addition, for insulation between the semiconductor layer andthe gate electrode, a gate insulating layer 120 may be arranged betweenthe semiconductor layer and the gate electrode, and the gate insulatinglayer 120 may include an inorganic material such as silicon oxide,silicon nitride, and/or silicon oxynitride. In addition, theinter-insulating layer 130 may be disposed over the gate electrode. Theinter-insulating layer 130 may include an inorganic material such assilicon oxide, silicon nitride, and/or silicon oxynitride. The sourceelectrode and the drain electrode may be arranged on theinter-insulating layer 130 together with the first wiring W1, the secondwiring W2, etc. In an exemplary embodiment, the insulating layerincluding the inorganic material may be provided by chemical vapordeposition (“CVD”) or an atomic layer deposition (“ALD”), for example.This is equally applied to exemplary embodiments and modificationsthereof below.

The 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the second wiringW2, the third wiring W3, and the fourth wiring W4 may include variousconductive materials and include a single-layered structure or amulti-layered structure. In an exemplary embodiment, each of the1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the second wiring W2,the third wiring W3, and the fourth wiring W4 may have a multi-layeredstructure of Ti/Al/Ti, for example.

The 1-1^(st) wiring W1-1 may extend in the first direction (a −ydirection) and include a 1-1^(st) end W1-1 a at an end portion thereofin the first direction. The 1-2^(nd) wiring W1-2 may face the 1-1^(st)end W1-1 a by extending in a direction (a +y direction) opposite to thefirst direction (the −y direction). Therefore, the 1-2nd wiring W1-2includes a 1-2^(nd) end W1-2 a apart from the 1-1^(st) end W1-1 a.

The second wiring W2 extends in the first direction (the −y direction)to correspond to the 1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2.The second wiring W2 is apart from the 1-1^(st) wiring W1-1 and the1-2^(nd) wiring W1-2 (in a +x direction).

The third wiring W3 extends in the first direction (the −y direction) tocorrespond to the 1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2. Thethird wiring W3 is disposed such that the second wiring W2 is betweenthe third wiring W3 and the 1-1^(st) wiring W1-1. Therefore, the firstwiring W1, the second wiring W2, and the third wiring W3 aresequentially disposed (in the +x direction). In addition, as shown inFIG. 2 , a fourth wiring W4 may be disposed between the second wiring W2and the third wiring W3. Also, the third wiring W3 may be disposed suchthat the first wiring W1 is between the second wiring W2 and the thirdwiring W3.

The first wiring W1 may include, for example, a data line, and thesecond wiring W2 may include, for example, a power line. That is, thefirst wiring W1 may include a data line which transfers a data signal toa pixel in which the first pixel electrode PE1 is disposed, and thesecond wiring W2 may include a power line which supplies power to apixel in which the first pixel electrode PE1 is disposed. The fourthwiring W4 disposed between the second wiring W2 and the third wiring W3may include, for example, a data line. The third wiring W3 may include,for example, a power line. That is, the fourth wiring W4 may include adata line which transfers a data signal to a pixel in which the secondpixel electrode PE2 is disposed, and the third wiring W3 may include apower line which supplies power to a pixel in which the second pixelelectrode PE2 is disposed.

As shown in FIG. 2 , the first wiring W1, the second wiring W2, thefourth wiring W4, and the third wiring W3 may be repeatedly arranged inthis sequence (in the +x direction). That is, the first wiring W1 andthe second wiring W2 may pass across a pixel in which the third pixelelectrode PE3 is disposed. The first wiring W1 may be a data line whichtransfers a data signal, and the second wiring W2 may be a power linewhich supplies power. The first wiring W1 and the second wiring W2related to the third pixel electrode PE3 are wirings separated from thefirst wiring W1 and the second wiring W2 related to the first pixelelectrode PE1.

The first bridge wiring BW1 is disposed on a layer different from alayer on which the 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, thesecond wiring W2, the third wiring W3, and the fourth wiring W4 aredisposed. That is, the 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2,the second wiring W2, the third wiring W3, and the fourth wiring W4 aredisposed on the first insulating layer, and the first bridge wiring BW1is disposed on a layer different from the first insulating layer. In anexemplary embodiment, as shown in FIG. 3 , the first bridge wiring BW1may be disposed over a 2-1^(st) insulating layer disposed over theinter-insulating layer 130, which is the first insulating layer, forexample. The 2-1^(st) insulating layer may include, for example, a firstplanarization layer 141. That is, the first planarization layer 141 maycover the 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the secondwiring W2, the third wiring W3, and the fourth wiring W4. The firstbridge wiring BW1 may be disposed over the first planarization layer141. In an exemplary embodiment, the first planarization layer 141 mayinclude, for example, an organic material such as polyimide, acrylicsiloxane, carbon black, benzocyclobutene (“BCB”), orhexamethyldisiloxane (“HMDSO”). The first bridge wiring BW1 may includevarious conductive materials and have a single-layered structure or amulti-layered structure. In an exemplary embodiment, the first bridgewiring BW1 may have a structure of Ti/Al/Ti, for example.

Like this, the first bridge wiring BW1 disposed over the firstplanarization layer 141, which is the 2-1^(st) insulating layer,contacts the 1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2 throughcontact holes CTH to electrically connect the 1-1st wiring W1-1 to the1-2^(nd) wiring W1-2. As shown in FIG. 2 , which is a plan view, thefirst bridge wiring BW1 has a convex shape in the direction (the −xdirection) opposite to the direction (the +x direction) from the1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2 to the second wiringW2. Therefore, a sufficiently wide space may be defined between acentral portion of the first bridge wiring BW1 and the second wiring W2.

The first pixel electrode PE1 and the second pixel electrode PE2 aredisposed over a 2-2^(nd) insulating layer covering the first bridgewiring BW1. The 2-2nd insulating layer may include, for example, asecond planarization layer 142. That is, the second planarization layer142 may cover the first bridge wiring BW1. The first pixel electrode PE1and the second pixel electrode PE2 may be disposed over the secondplanarization layer 142. In an exemplary embodiment, the secondplanarization layer 142 may include, for example, an organic materialsuch as polyimide, acrylic siloxane, carbon black, BCB, or HMDSO. Thefirst pixel electrode PE1 and the second pixel electrode PE2 may includevarious conductive materials and have a single-layered structure or amulti-layered structure. In an exemplary embodiment, the first pixelelectrode PE1 and the second pixel electrode PE2 may include areflective layer and a transparent conductive layer, for example. In anexemplary embodiment, the reflective layer may include a metal such asaluminum (Al) or copper (Cu), and the transparent conductive layer maybe disposed on the reflective layer and include indium tin oxide(“ITO”), indium zinc oxide (“IZO”), and indium oxide (In₂O₃).

The first pixel electrode PE1 disposed over the second planarizationlayer 142 includes one side (in the +x direction) disposed over thesecond wiring W2. In addition, another side (the −x direction) of thefirst pixel electrode PE1 is disposed above a space between the 1-1^(st)end W1-1 a and the 1-2^(nd) end W1-2 a.

Unlike an inorganic insulating layer including an inorganic material,since the first planarization layer 141 and the second planarizationlayer 142 include an organic material, top surfaces of the firstplanarization layer 141 and the second planarization layer 142 areapproximately flat despite the presence of elements arranged thereunder.However, even though an organic layer includes an organic material, atop surface thereof is not completely flat and has a slight bendingcorresponding to elements arranged thereunder.

It is shown in FIG. 3 that a top surface of each of the firstplanarization layer 141 and the second planarization layer 142 has aslight bending. Since the second planarization layer 142 is disposed onthe slightly flat top surface of the first planarization layer 141, atop surface of the second planarization layer 142 is relatively flatterthan the top surface of the first planarization layer 141. However, thetop surface of the second planarization layer 142 is still affected bythe elements below the first planarization layer 141 and thus has acurved shape. Therefore, the top surface of the second planarizationlayer 142 has a slightly convex shape (in a +z direction) above thesecond wiring W2. The top surface of the second planarization layer 142has a slightly convex shape (in the +z direction) above the 1-1^(st)wiring W1-1 and the 1-2^(nd) wiring W1-2. However, the top surface ofthe second planarization layer 142 has a flat shape between the 1-1^(st)end W1-1 a and the 1-2^(nd) end W1-2 a. As described above, this isbecause the first bridge wiring BW1 has the convex shape in thedirection (the −x direction) opposite to the direction (the +xdirection) from the 1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2 tothe second wiring W2.

The first pixel electrode PE1 disposed over the second planarizationlayer 142 including the top surface of this shape is relatively inclinedwith respect to the substrate 100 as shown in FIG. 3 . That is, aportion of the first pixel electrode PE1 which is disposed above thesecond wiring W2 and which is one side (in the +x direction) of thefirst pixel electrode PE1 has a distance farther away from the substrate100 than another side (in the −x direction) of the first pixel electrodePE1 that is disposed above a space between the 1-1^(st) end W1-1 a andthe 1-2^(nd) end W1-2 a.

As shown in FIGS. 2 and 4 , one side (in the +x direction) of the secondpixel electrode PE2 is disposed above the third wiring W3, and anotherside (in the −x direction) of the second pixel electrode PE2 is disposedabove a space between the second wiring W2 and the third wiring W3. Thetop surface of the second planarization layer 142 has a slightly convexshape (in the +z direction) above the third wiring W3. However, the topsurface of the second planarization layer 142 has an approximately flatshape between the second wiring W2 and the third wiring W3, morespecifically, between the fourth wiring W4 disposed between the secondwiring W2 and the third wiring W3 and the third wiring W3. As shown inFIG. 4 , the second pixel electrode PE2 disposed over the secondplanarization layer 142 having this shape is relatively inclined withrespect to the substrate 100. That is, a portion of the second pixelelectrode PE2 which is disposed above the third wiring W3 and which isone side (in the +x direction) of the second pixel electrode PE2 has adistance farther away from the substrate 100 than another side (in the−x direction) of the second pixel electrode PE2 that is disposed above aspace between the second wiring W2 and the third wiring W3.

FIG. 5 is a plan view of a comparative example of a portion of a displaydevice, and FIG. 6 is a cross-sectional view of the display device takenalong line VI-VI of FIG. 5 . In the display device according to acomparative art, the first wiring W1 has a shape extending in the firstdirection (the −y direction) without disconnection instead of having the1-1^(st) end W1-1 a and the 1-2^(nd) end W1-2 a apart from each other.Therefore, as shown in FIG. 4 , the top surface of the secondplanarization layer 142 has a convex shape (in the +z direction) inportions respectively corresponding to the first wiring W1 and thesecond wiring W2. In addition, one side (in the +x direction) of thefirst pixel electrode PE1 that is disposed over the second planarizationlayer 142 is approximately disposed above the second wiring W2, andanother side (in the −x direction) of the first pixel electrode PE1 isapproximately disposed above the first wiring W1.

Therefore, unlike the first pixel electrode PE1 of the display device 1in the illustrated exemplary embodiment described with reference to FIG.3 , a comparative example of the first pixel electrode PE1 of thedisplay device is not inclined to one side with respect to the substrate100, and as shown in FIG. 6 , has an approximately flat shape, that is,a shape in which both an edge of the first pixel electrode PE1 in the +xdirection and an edge of the first pixel electrode PE1 in the −xdirection are convex in the +z direction. However, like the second pixelelectrode PE2 of the illustrated exemplary embodiment of the displaydevice 1 described with reference to FIG. 4 , the second electrode PE2of the comparative example of the display device is relatively inclinedwith respect to the substrate 100. This is because a portion of thesecond pixel electrode PE2 which is one side (in the +x direction) ofthe second pixel electrode PE2 and which is disposed above the thirdwiring W3 has a distance farther away from the substrate 100 thananother side (in the −x direction) of the second pixel electrode PE2that is disposed above a space between the second wiring W2 and thethird wiring W3.

In the display device, to reduce external light reflection, a colorfilter is arranged over each pixel. In the case of a pixel emitting redlight, a red color filter transmitting only red light is arranged, forexample. In the case of a pixel emitting blue light, a blue color filtertransmitting only blue light is arranged, for example. In the case of apixel emitting green light, a green color filter transmitting only greenlight is arranged, for example. Therefore, when external light, which iswhite light, is incident to, for example, a red color filter, blue lightand green light are absorbed in the red color filter and only red lightpasses through the red color filter and then is reflected by a pixelelectrode, passes through the red color filter again, and is emitted tothe outside. Therefore, in the case of the display device including thecolor filter, external light reflection is reduced to one-third (⅓)compared to the display device including no color filter.

However, in the comparative example of the display device shown in FIGS.5 and 6 , a user may view a color band by external light reflection.That is, as shown in FIG. 6 , light reflected by the first pixelelectrode PE1 having an approximately flat shape with respect to thesubstrate 100 progresses in the +z direction approximately perpendicularto the substrate 100. In contrast, as shown in FIG. 4 , light reflectedby the second pixel electrode PE2 having a shape inclined with respectto the substrate 100 progresses at a particular angle that is notperpendicular to the substrate 100. Therefore, in the case where thesecond pixel electrode PE2 is a pixel electrode of a pixel emittinggreen light, a user views, as reflected light, light that is close topurple light in which red light and blue light are mixed in a directionperpendicular to the substrate 100, and views, as reflected light, lightthat is close to green light at a particular angle that is notperpendicular to the substrate 100. Therefore, in the comparativeexample of the display device, a user views a color band by externallight reflection.

In contrast, in the illustrated exemplary embodiment of the displaydevice 1, not only the second pixel electrode PE2 but also the firstpixel electrode PE1 is inclined with respect to the substrate 100.Therefore, a user may not view a color band by external light reflectionor the degree of the color band may be minimized even though the colorband may be viewed by the user.

Similarly to the second pixel electrode PE2, to keep the first pixelelectrode PE1 inclined with respect to the substrate 100, the topsurface of the second planarization layer 142 is made to have anapproximately flat shape between the 1-1^(st) end W1-1 a and the1-2^(nd) end W1-2 a by making the 1-1^(st) end W1-1 a apart from the1-2^(nd) end W1-2 a. For this purpose, the first bridge wiring BW1electrically connecting the 1-1^(st) end W1-1 a to the 1-2^(nd) end W1-2a should not pass below the first pixel electrode PE1. Therefore, it isdesired that an orthogonal projection image of the first pixel electrodePE1 onto the substrate 100 does not overlap an orthogonal projectionimage of the first bridge wiring BW1 onto the substrate 100. In the caseof the second pixel electrode PE2, an orthogonal projection image of thesecond pixel electrode PE2 onto the substrate 100 does not overlap anorthogonal projection image of the second wiring W2 onto the substrate100.

For reference, as shown in FIG. 2 , the arrangement relationship betweenthe third pixel electrode PE3 and wirings therearound is similar to thearrangement relationship between the first pixel electrode PE1 andwirings therearound. That is, one side (in the +x direction) of thethird pixel electrode PE3 is disposed above the second wiring W2. Also,another side (in the −x direction) of the third pixel electrode PE3 isdisposed above a space between the 1-1^(st) end W1-1 a and the 1-2^(nd)end W1-2 a. Therefore, the third pixel electrode PE3 is inclined similarto the first pixel electrode PE1 arranged in FIG. 3 .

It is shown in FIG. 2 that an area of one first pixel electrode PE1, anarea of one second pixel electrode PE2, and an area of one third pixelelectrode PE3 are different from one another. This is becauselight-emission efficiency may be different for each pixel. In addition,it is shown in FIG. 2 that the number of second pixel electrodes PE2 perunit area is greater than the number of first pixel electrodes PE1 perunit area and the number of third pixel electrodes PE3 per unit area.Therefore, an area of one second pixel electrode PE2 may be less than anarea of one first pixel electrode PE1 and an area of one third pixelelectrode PE3. The same is applied to exemplary embodiments below andmodifications thereof.

A pixel-defining layer (not shown) may be arranged on the secondplanarization layer 142. The pixel-defining layer defines a pixel bydefining an opening corresponding to each sub-pixel, that is, an openingexposing at least a central portion of each of the first pixel electrodePE1 to the third pixel electrode PE3. The pixel-defining layer mayinclude an organic material such as polyimide or HMDSO.

In the case where the display device includes an organic light-emittingdiode as a display element, an intermediate layer (not shown) may bedisposed over the first pixel electrode PE1 to the third pixel electrodePE3. An opposite electrode (not shown) may be disposed over theintermediate layer.

The intermediate layer may include a low molecular weight material or apolymer material. In the case where the intermediate layer includes alow molecular weight material, the intermediate layer may have astructure in which a hole injection layer (“HIL”), a hole transportlayer (“HTL”), an emission layer (“EML”), an electron transport layer(“ETL”), an electron injection layer (“EIL”), etc., are stacked. In anexemplary embodiment, the intermediate layer may include various organicmaterials such as copper phthalocyanine (CuPc), N, N′-Di(naphthalene-1-yl)-N, N′-diphenyl-benzidine (“NPB”), andtris-8-hydroxyquinoline aluminum (Alq3). These layers may be provided byvacuum deposition.

In the case where the intermediate layer includes a polymer material,the intermediate layer may have a structure generally including an HTLand an EML. In this case, the HTL may include poly-3, 4-ethylene dioxythiophene (“PEDOT”), and the EML may include a polymer material such asa polyphenylene vinylene (“PPV”)-based material and a polyfluorene-basedmaterial. In an exemplary embodiment, the intermediate layer may beprovided by screen printing, an inkjet printing method, and laserinduced thermal imaging (“LITI”), for example.

The structure of the intermediate layer is not limited to the abovedescription and may have various structures. In addition, theintermediate layer may include a single unitary body which covers thefirst pixel electrode PE1 to the third pixel electrode PE3, or include alayer patterned to correspond to each of the first pixel electrode PE1to the third pixel electrode PE3.

The opposite electrode may be arranged to cover the display area DA.That is, the opposite electrode may be provided as a single unitary bodyover a plurality of organic light-emitting diodes to correspond to thefirst pixel electrode PE1 to the third pixel electrode PE3. In anexemplary embodiment, the opposite electrode may include a transparentconductive layer including ITO, IZO, or In₂O₃, for example.

Though it is shown in FIG. 2 that the first bridge wiring BW1 partiallyoverlaps the third wiring W3 therebelow, the invention is not limitedthereto. In an exemplary embodiment, the first bridge wiring BW1 may notoverlap the third wiring W3 by securing an interval between the thirdwiring W3 and the 1-1^(st) wiring W1-1, for example. This is applicableto the relationship between various bridge wirings and wiringstherebelow in exemplary embodiments below and modifications thereof.

FIGS. 7 and 8 are cross-sectional views of another exemplary embodimentof portions of the display device 1. As shown in the drawings, the firstpixel electrode PE1 may be electrically connected to the second wiringW2, and the second pixel electrode PE2 may be electrically connected tothe third wiring W3. In this case, the second wiring W2 and the thirdwiring W3 may not be the power lines as in the above exemplaryembodiment and may be a wiring connected to one of a source electrodeand a drain electrode of a TFT. In an alternative exemplary embodiment,the second wiring W2 and the third wiring W3 may be one of the sourceelectrode and the drain electrode of the TFT. In this case, the TFT maybe a driving TFT or an emission control TFT.

That is, in an organic light-emitting display device, a pixel circuitmay be arranged to each pixel to control an operation of each pixel, andthe pixel circuit may include a plurality of TFTs and a capacitor. Thepixel circuit may be electrically connected to a corresponding pixelelectrode. In this case, the second wiring W2 and the third wiring W3may not be the power lines as in the above exemplary embodiment and maybe an electronic element such as a TFT electrically connected to thefirst pixel electrode PE1 and the second pixel electrode PE2, or wiringsconnected to the electronic element.

In this case, as shown in FIGS. 7 and 8 , a 2-1^(st) via hole VH2-1 anda 3-1^(st) via hole VH3-1 may be defined in the first planarizationlayer 141, which is the 2-1^(st) insulating layer. The 2-1^(st) via holeVH2-1 is over the second wiring W2, and the 3-1^(st) via hole VH3-1 isover the third wiring W3. In addition, a 2-2^(nd) via hole VH2-2 and a3-2^(nd) via hole VH3-2 may be defined in the second planarization layer142, which is the 2-2^(nd) insulating layer on the 2-1^(st) insulatinglayer. The 2-2^(nd) via hole VH2-2 may correspond to the 2-1^(st) viahole VH2-1, and the 3-2^(nd) via hole VH3-2 may correspond to the3-1^(st) via hole VH3-1. Therefore, the first pixel electrode PE1 maycontact the second wiring W2 through the 2-1^(st) via hole VH2-1 and the2-2^(nd) via hole VH2-2, and the second pixel electrode PE2 may contactthe third wiring W3 through the 3-1^(st) via hole VH3-1 and the 3-2^(nd)via hole VH3-2.

Though it is shown in FIG. 7 that the second planarization layer 142covers an inner surface of the 2-1^(st) via hole VH2-1, the invention isnot limited thereto. In an exemplary embodiment, since the 2-2^(nd) viahole VH2-2 exposes an inner surface of the 2-1^(st) via hole VH2-1, theinner surface of the 2-1^(st) via hole VH2-1 may directly contact thefirst pixel electrode PE1, for example. Though it is shown in FIG. 8that the second planarization layer 142 covers an inner surface of the3-1^(st) via hole VH3-1, the invention is not limited thereto. In anexemplary embodiment, since the 3-2^(nd) via hole VH3-2 exposes an innersurface of the 3-1^(st) via hole VH3-1, the inner surface of the3-1^(st) via hole VH3-1 may directly contact the second pixel electrodePE2, for example.

During a manufacturing process, a material of the first planarizationlayer 141 and the second planarization layer 142 may have acharacteristic such as a photoresist. Therefore, a material for thefirst planarization layer 141 is disposed on the inter-insulating layer130 by a method such as slit coating, and the 2-1^(st) via hole VH2-1and the 3-1^(st) via hole VH3-1 are defined through an exposing anddeveloping. In an exemplary embodiment, curing may be performed forabout 60 minutes at 250 degrees Celsius, for example. Then, a materialfor the second planarization layer 142 is provided to cover the firstplanarization layer 141 by a method such as slit coating, and the2-2^(nd) via hole VH2-2 and the 3-2^(nd) via hole VH3-2 are definedthrough an exposing and developing. In addition, curing may be performedfor about 60 minutes at 250 degrees Celsius. Before the secondplanarization layer 142 is provided after the first planarization layer141 is provided, the first bridge wiring BW1, etc., may be provided by adeposition method that uses a fine metal mask.

As shown in FIGS. 7 and 8 , when the first pixel electrode PE1 contactsthe second wiring W2 corresponding thereto through the 2-1^(st) via holeVH2-1 and the 2-2^(nd) via hole VH2-2, and the second pixel electrodePE2 contacts the third wiring W3 corresponding thereto through the3-1^(st) via hole VH3-1 and the 3-2^(nd) via hole VH3-2, the locationsof the via holes may correspond to outer edges, not emission areas ofthe pixel electrodes. Furthermore, as shown in FIG. 9 , which is a planview of another exemplary embodiment of a portion of the display device1, the first pixel electrode PE1 may include protrusions protruding inthe +x direction and the −y direction and contact the second wiring W2corresponding thereto through the 2-1^(st) via hole VH2-1 and the2-2^(nd) via hole VH2-2 defined in the places where the protrusions aredisposed. In addition, the second pixel electrode PE2 may includeprotrusions protruding in the +x direction and the +y direction andcontact the third wiring W3 corresponding thereto through the 3-1^(st)via hole VH3-1 and the 3-2^(nd) via hole VH3-2 defined in the placeswhere the protrusions are disposed. Like the first pixel electrode PE1,the third pixel electrode PE3 may include protrusions protruding in the+x direction and the −y direction and contact the second wiring W2corresponding thereto through the via holes defined in the places wherethe protrusions are disposed. For reference, in FIG. 9 , all via holesare represented by a reference character VH, for convenience ofdescription.

Though it is described that the first bridge wiring BW1 is disposedbetween the first planarization layer 141 and the second planarizationlayer 142 and that the first pixel electrode PE1 to the third pixelelectrode PE3 are disposed over the second planarization layer 142 inthe exemplary embodiments above, the invention is not limited thereto.In another exemplary embodiment, as shown in FIGS. 10 and 11 , which arecross-sectional views of a portion of the display device 1, aplanarization layer 140, which is a second insulating layer, may coverthe 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the second wiringW2, and the third wiring W3. The first bridge wiring BW1, the firstpixel electrode PE1, the second pixel electrode PE2 may be disposed overthe second insulating layer not to contact one another, for example.

The first bridge wiring BW1 has a convex shape in the direction (the −xdirection) opposite to the direction (the +x direction) from the1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2 to the second wiringW2. Therefore, a sufficiently wide space may be defined between thecentral portion of the first bridge wiring BW1 and the second wiring W2,and a portion of the first pixel electrode PE1 may be disposed in thespace. Therefore, the first bridge wiring BW1 and the first pixelelectrode PE1 may be disposed over the same layer. In this case, thefirst bridge wiring BW1 may include the same material as that of thefirst pixel electrode PE1 and be simultaneously provided while the firstpixel electrode PE1 is provided. Therefore, the first bridge wiring BW1may include the same material as that of the first pixel electrode PE1and have the same layered structure as that of the first pixel electrodePE1.

Even in this case, as shown in FIGS. 10 and 11 , the first pixelelectrode PE1 is relatively inclined with respect to the substrate 100,and similarly, the second pixel electrode PE2 is relatively inclinedwith respect to the substrate 100. Therefore, a color band by externallight reflection may not occur or be minimized.

Since the first bridge wiring BW1 electrically connecting the 1-1^(st)wiring W1-1 to the 1-2^(nd) wiring W1-2 does not contact the first pixelelectrode PE1 while disposed over the same layer as the first pixelelectrode PE1, an orthogonal projection image of the first pixelelectrode PE1 onto the substrate 100 does not overlap an orthogonalprojection image of the first bridge wiring BW1 onto the substrate 100.In addition, an orthogonal projection image of the second pixelelectrode PE2 onto the substrate 100 does not overlap an orthogonalprojection image of the second wiring W2 onto the substrate 100.

Even in this case, as shown in FIGS. 12 and 13 , which arecross-sectional views of another exemplary embodiment of portions of thedisplay device 1, a second via hole and a third via hole may be definedin the planarization layer 140, which is the second insulating layer.The second via hole may be defined over the second wiring W2 and thethird via hole may be defined over the third wiring W3. The first pixelelectrode PE1 may contact the second wiring W2 through the second viahole and the second pixel electrode PE2 may contact the third wiring W3through the third via hole.

FIG. 14 is a plan view of another exemplary embodiment of a portion ofthe display device 1, and FIG. 15 is a cross-sectional view of thedisplay device 1 taken along line XV-XV of FIG. 14 . Though descriptionhas been made to the display device having a structure in which thefirst pixel electrode PE1 to the third pixel electrode PE3 are similarlyinclined with respect to the substrate 100 in the exemplary embodimentsabove, an illustrated exemplary embodiment of a display device in whichthe first pixel electrode PE1 to the third pixel electrode PE3 areapproximately flat with respect to the substrate 100 is described.

The display device in the illustrated exemplary embodiment is differentfrom the display device according to the exemplary embodiment above inthat the first wiring W1 arranged on the inter-insulating layer 130,which is the first insulating layer, extends in the first direction (the−y direction) and does not have the first end W1-1 a or the second endW1-2 a. Like the exemplary embodiment above, the second wiring W2 isdisposed over the inter-insulating layer 130, which is the firstinsulating layer, extends in the first direction (the −y direction) tocorrespond to the first wiring W1 and is apart in the +x direction fromthe first wiring W1. Therefore, a cross-section taken along line VI-VIof FIG. 14 has a shape shown in FIG. 6 , which is a cross-sectional viewof a comparative example of the display device taken along line VI-VI.

That is, in the illustrated exemplary embodiment of the display device,a top surface of the second planarization layer 142 has a convex shape(in the +z direction) in portions thereof corresponding to the firstwiring W1 and the second wiring W2. In addition, one side (in the +xdirection) of the first pixel electrode PE1 that is disposed over thesecond planarization layer 142 is approximately disposed above thesecond wiring W2, and another side (in the −x direction) of the firstpixel electrode PE1 is approximately disposed above the first wiring W1.Therefore, the first pixel electrode PE1 of the display device in theillustrated exemplary embodiment has an approximately flat shape withrespect to the substrate 100 as shown in FIG. 6 .

Unlike the exemplary embodiments of the display device described above,in the illustrated exemplary embodiment of the display device, the thirdwiring W3 which is disposed over the inter-insulating layer 130 suchthat the second wiring W2 is between the first wiring W1 and the thirdwiring W3 includes the 3-1^(st) wiring W3-1 and the 3-2^(nd) wiringW3-2. The 3-1^(st) wiring W3-1 extends in the first direction (the −ydirection) and includes a 3-1^(st) end W3-1 a at an end portion thereofin the first direction (the −y direction). The 3-2^(nd) wiring W3-2faces the 3-1^(st) end W3-1 a by extending in the direction (the +ydirection) opposite to the first direction (the −y direction) andincludes a 3-2^(nd) end W3-2 a apart from the 3-1^(st) end W3-1 a.

A third bridge wiring BW3 is disposed on a layer different from a layeron which the first wiring W1, the second wiring W2, the 3-1^(st) wiringW3-1, the 3-2^(nd) wiring W3-2, and the fourth wiring W4 are disposed.That is, the first wiring W1, the second wiring W2, the 3-1^(st) wiringW3-1, the 3-2^(nd) wiring W3-2, and the fourth wiring W4 are disposedover the first insulating layer, and the third bridge wiring BW3 isdisposed over a layer different from the first insulating layer. In anexemplary embodiment, as shown in FIG. 15 , the third bridge wiring BW3may be disposed over the 2-1^(st) insulating layer on theinter-insulating layer 130, which is the first insulating layer, forexample. The 2-1^(st) insulating layer may include, for example, thefirst planarization layer 141. That is, the first planarization layer141 may cover the first wiring W1, the second wiring W2, the 3-1^(st)wiring W3-1, the 3-2^(nd) wiring W3-2, and the fourth wiring W4. Thethird bridge wiring BW3 may be disposed over the first planarizationlayer 141. The material of the first planarization layer 141 is the sameas described above. The third bridge wiring BW3 may include variousconductive materials and include a single-layered structure or amulti-layered structure. In an exemplary embodiment, the third bridgewiring BW3 may have a structure of Ti/Al/Ti, for example.

As described above, the third bridge wiring BW3 on the firstplanarization layer 141, which is the 2-1^(st) insulating layer,contacts the 3-1^(st) wiring W3-1 and the 3-2^(nd) wiring W3-2 throughcontact holes CTH to electrically connect the 3-1^(st) wiring W3-1 tothe 3-2^(nd) wiring W3-2. In addition, as shown in FIG. 14 , which is aplan view, the third bridge wiring BW3 has a convex shape in thedirection (the +x direction) opposite to the direction (the −xdirection) from the 3-1^(st) wiring W3-1 and the 3-2nd wiring W3-2 tothe second wiring W2. Therefore, a sufficiently wide space may bedefined between the central portion of the third bridge wiring BW3 andthe second wiring W2. The second pixel electrode PE2 is disposed abovethe space secured in this manner. That is, one side of the second pixelelectrode PE2 is disposed above a space (in the +z direction) betweenthe 3-1^(st) end W3-1 a and the 3-2^(nd) end W3-2 a, and another side ofthe second pixel electrode PE2 is disposed above a space between acenter of a space between the 3-1^(st) end W3-1 a and the 3-2^(nd) endW3-2 a, and the second wiring W2. As a result, since the second wiringW2, the fourth wiring W4, and the third wiring W3 do not pass below thesecond pixel electrode PE2, the second pixel electrode PE2 is notinclined with respect to the substrate 100 as shown in FIG. 15 .

As described above, in the illustrated exemplary embodiment of thedisplay device, the first pixel electrode PE1 and the second pixelelectrode PE2 are not inclined with respect to the substrate 100 asshown in FIGS. 6 and 15 . Therefore, a user may not view a color band byexternal light reflection or the degree of the color band may beminimized even when the color band is viewed by the user.

To allow the second pixel electrode PE2 not to be inclined with respectto the substrate 100, a top surface of the second planarization layer142 is made to have an approximately flat shape between the 3-1^(st) endW3-1 a and the 3-2^(nd) end W3-2 a by making the 3-1^(st) end W3-1 aapart from the 3-2^(nd) end W3-2 a. For this purpose, the third bridgewiring BW3 should not pass below the second pixel electrode PE2, thethird bridge wiring BW3 electrically connecting the 3-1^(st) wiring W3-1to the 3-2^(nd) wiring W3-2. Therefore, it is desired that an orthogonalprojection image of the second pixel electrode PE2 onto the substrate100 does not overlap an orthogonal projection image of the third bridgewiring BW3 onto the substrate 100.

For reference, as shown in FIG. 14 , the arrangement relationshipbetween the third pixel electrode PE3 and the wirings therearound issimilar to the arrangement relationship between the first pixelelectrode PE1 and the wirings therearound. That is, one side (in the +xdirection) of the third pixel electrode PE3 is disposed above the secondwiring W2. In addition, another side (in the −x direction) of the thirdpixel electrode PE3 is disposed above the first wiring W1. Therefore,similarly to the first pixel electrode PE1 shown in FIG. 6 , the thirdpixel electrode PE3 is not inclined with respect to the substrate 100.

As described above, the third bridge wiring BW3 has a convex shape inthe direction (the +x direction) opposite to the direction (the −xdirection) from the 3-1^(st) wiring W3-1 and the 3-2^(nd) wiring W3-2 tothe second wiring W2. Therefore, it is preferable that a virtual lineconnecting the 3-1^(st) wiring W3-1 to the 3-2^(nd) wiring W3-2 passesbelow the one side of the second pixel electrode PE2. The one side ofthe second pixel electrode PE2 is a part of the second pixel electrodePE2 in the direction (the +x direction) opposite to the direction (the−x direction) to the second wiring W2. Through this configuration, atotal length of the third bridge wiring BW3 may be minimized.

In the illustrated exemplary embodiment of the display device, the firstwiring W1 may include, for example, the data line, and the second wiringW2 may include, for example, the power line. That is, the first wiringW1 may include a data line which transfers a data signal to a pixel inwhich the first pixel electrode PE1 is disposed, and the second wiringW2 may include a power line which supplies power to a pixel in which thefirst pixel electrode PE1 is disposed. The fourth wiring W4 disposedbetween the second wiring W2 and the third wiring W3 may include, forexample, a data line, and the third wiring W3 may include, for example,the power line. That is, the fourth wiring W4 may include a data linewhich transfers a data signal to a pixel in which the second pixelelectrode PE2 is disposed, and the third wiring W3 may include a powerline which supplies power to a pixel in which the second pixel electrodePE2 is disposed.

However, the invention is not limited thereto. In an exemplaryembodiment, the first pixel electrode PE1 may be electrically connectedto one of the first wiring W1 and the second wiring W2, and the secondpixel electrode PE2 may be electrically connected to the third bridgewiring BW3, for example. In this case, the wiring to which the firstpixel electrode PE1 is electrically connected may not be a data line ora power line and may be a wiring connected to one of a source electrodeand a drain electrode of a TFT. In an alternative exemplary embodiment,the wiring to which the first pixel electrode PE1 is electricallyconnected may be one of the source electrode and the drain electrode ofthe TFT. In this case, the TFT may include a driving TFT or an emissioncontrol TFT. The 3-1^(st) wiring W3-1 and the 3-2^(nd) wiring W3-2electrically connected to the third bridge wiring BW3 may not be a dataline or a power line and may be a wiring connected to one of a sourceelectrode and a drain electrode of a TFT. In an alternative exemplaryembodiment, the wiring electrically connected to the third bridge wiringBW3 may be one of the source electrode and the drain electrode of theTFT.

In this case, the 2-1^(st) via hole defined over the second wiring W2may be defined in the first planarization layer 141, which is the2-1^(st) insulating layer. In addition, the 2-2^(nd) via hole and thethird via hole may be defined in the second planarization layer 142,which is the 2-2^(nd) insulating layer on the 2-1^(st) insulating layer.The 2-2^(nd) via hole corresponds to the 2-1^(st) via hole, and thethird via hole is over the third bridge wiring BW3. Therefore, the firstpixel electrode PE1 may contact the second wiring W2 through the2-1^(st) via hole and the 2-2^(nd) via hole, and the second pixelelectrode PE2 may contact the third bridge wiring BW3 through the thirdvia hole.

When the first pixel electrode PE1 contacts the second wiring W2 throughthe 2-1^(st) via hole and the 2-2^(nd) via hole, and the second pixelelectrode PE2 is electrically connected to the third wiring W3 throughthe third bridge wiring BW3 through the third via hole, the locations ofthe via holes may correspond to outer edges, not emission areas of thepixel electrodes. Furthermore, as shown in FIG. 16 , which is a planview of another exemplary embodiment of a portion of the display device1, the first pixel electrode PE1 may include protrusions protruding inthe +x direction and the −y direction and contact the second wiring W2corresponding thereto through the 2-1^(st) via hole and the 2-2^(nd) viahole defined in places where the protrusions are disposed. In addition,the second pixel electrode PE2 may include protrusions protruding in the+x direction and the +y direction and contact the third wiring W3corresponding thereto through the third bridge wiring BW3 through thethird via holes defined in places where the protrusions are disposed.Like the first pixel electrode PE1, the third pixel electrode PE3includes protrusions protruding in the +x direction and the −y directionand contacts the second wiring W2 corresponding thereto through viaholes defined in places where the protrusions are disposed. Forreference, in FIG. 16 , all via holes are represented by a referencecharacter VH, for convenience of description.

In FIGS. 14 to 16 , description has been made to the case where thefirst pixel electrode PE1 and the second pixel electrode PE2 areapproximately parallel to the substrate 100 by the third bridge wiringBW3 near the second pixel electrode PE2. However, the invention is notlimited thereto.

In an exemplary embodiment, as shown in FIG. 17 , which is a plan viewof another exemplary embodiment of a portion of the display device 1,the first bridge wiring BW1 and the second bridge wiring BW2 may bedisposed near the first pixel electrode PE1, and the third bridge wiringBW3 may be disposed near the second pixel electrode PE2, for example.

The 1-1^(st) wiring W1-1 extends in the first direction (the −ydirection) and includes the 1-1^(st) end W1-1 a at an end portionthereof in the first direction. The 1-2^(nd) wiring W1-2 faces the1-1^(st) end W1-1 a by extending in the direction (the +y direction)opposite to the first direction (the −y direction). Therefore, the1-2^(nd) wiring W1-2 includes the 1-2^(nd) end W1-2 a apart from the1-1st end W1-1 a.

A 2-1^(st) wiring W2-1 extends in the first direction (the −y direction)and is apart from the 1-1^(st) wiring W1-1 and the 1-2^(nd) wiring W1-2.The 2-1^(st) wiring W2-1 includes a 2-1^(st) end W2-1 a at an endportion thereof in the first direction. The 2-2^(nd) wiring W2-2 facesthe 2-1^(st) end W2-1 a by extending in the direction (the +y direction)opposite to the first direction (the −y direction). Therefore, the2-2^(nd) wiring W2-2 includes a 2-2^(nd) end W2-2 a apart from the2-1^(st) end W2-1 a.

The 3-1^(st) wiring W3-1 extends in the first direction (the −ydirection) and is disposed such that the 2-1^(st) wiring W2-1 is betweenthe 1-1^(st) wiring W1-1 and the 3-1^(st) wiring W3-1. The 3-1^(st)wiring W3-1 includes the 3-1^(st) end W3-1 a at an end portion thereofin the first direction (the −x direction). The 3-2^(nd) wiring W3-2extends in the direction (the +y direction) opposite to the firstdirection (the −y direction) and includes the 3-2^(nd) end W3-2 a facingthe 3-1^(st) end W3-1 a and being apart from the 3-1^(st) end W3-1 a.

The first bridge wiring BW1 is disposed on a layer different from alayer on which the 1-1^(st) wiring W1-1, the 1-2^(nd) wiring W1-2, the2-1^(st) wiring W2-1, the 2-2^(nd) wiring W2-2, the 3-1^(st) wiringW3-1, and the 3-2^(nd) wiring W3-2 are disposed. That is, the 1-1^(st)wiring W1-1, the 1-2^(nd) wiring W1-2, the 2-1^(st) wiring W2-1, the2-2^(nd) wiring W2-2, the 3-1^(st) wiring W3-1, and the 3-2^(nd) wiringW3-2 are disposed on the first insulating layer, and the first bridgewiring BW1 is disposed on a layer different from the first insulatinglayer. In an exemplary embodiment, the first bridge wiring BW1 may bedisposed on the 2-1^(st) insulating layer on the inter-insulating layer130, which is the first insulating layer, for example. The 2-1^(st)insulating layer may include, for example, the first planarization layer141. That is, the first planarization layer 141 may cover the 1-1^(st)wiring W1-1, the 1-2^(nd) wiring W1-2, the 2-1^(st) wiring W2-1, the2-2^(nd) wiring W2-2, the 3-1^(st) wiring W3-1, and the 3-2^(nd) wiringW3-2. The first bridge wiring BW1 may be disposed on the firstplanarization layer 141. The configuration of the first planarizationlayer 141 is the same as described above.

The first bridge wiring BW1 disposed over the first planarization layer141, which is the 2-1^(st) insulating layer, contacts the 1-1^(st)wiring W1-1 and the 1-2^(nd) wiring W1-2 to electrically connect the1-1^(st) wiring W1-1 to the 1-2^(nd) wiring W1-2. In addition, as shownin FIG. 17 , the first bridge wiring BW1 has a convex shape in thedirection (the −x direction) opposite to the direction (the +xdirection) from the 1-1st wiring W1-1 and the 1-2nd wiring W1-2 to the2-1^(st) wiring W2-1.

Similarly to the first bridge wiring BW1, the second bridge wiring BW2disposed over the first planarization layer 141, which is the 2-1^(st)insulating layer, contacts the 2-1^(st) wiring W2-1 and the 2-2^(nd)wiring W2-2 to electrically connect the 2-1^(st) wiring W2-1 to the2-2^(nd) wiring W2-2. In addition, as shown in FIG. 17 , the secondbridge wiring BW2 has a convex shape in the direction (the +x direction)opposite to the direction (the −x direction) from the 2-1^(st) wiringW2-1 and the 2-2^(nd) wiring W2-2 to the 1-1^(st) wiring W1-1.

Similarly to the first bridge wiring BW1, the third bridge wiring BW3disposed over the first planarization layer 141, which is the 2-1^(st)insulating layer, contacts the 3-1^(st) wiring W3-1 and the 3-2^(nd)wiring W3-2 to electrically connect the 3-1^(st) wiring W3-1 to the3-2^(nd) wiring W3-2. In addition, as shown in FIG. 17 , the thirdbridge wiring BW3 has a convex shape in the direction (the +x direction)opposite to the direction (the −x direction) from the 3-1^(st) wiringW3-1 and the 3-2^(nd) wiring W3-2 to the 2-1^(st) wiring W2-1.

The first pixel electrode PE1 and the second pixel electrode PE2 aredisposed over the second planarization layer 142, which is the 2-2^(nd)insulating layer covering the first bridge wiring BW1 to the thirdbridge wiring BW3. One side of the first pixel electrode PE1 is disposedin a space between the 1-1^(st) end W1-1 a and the 1-2^(nd) end W1-2 a,and another side of the first pixel electrode PE1 is disposed in a spacebetween the 2-1^(st) end W2-1 a and the 2-2^(nd) end W2-2 a. Therefore,the first pixel electrode PE1 has an approximately flat shape withrespect to the substrate 100. One side of the second pixel electrode PE2is disposed above a space between the 3-1^(st) end W3-1 a and the3-2^(nd) end W3-2 a. Another side of the second pixel electrode PE2 maybe disposed above a space between a center of a space between the3-1^(st) end W3-1 a and the 3-2^(nd) end W3-2 a, and the 2-1^(st) wiringW2-1, or disposed above a space between a center of a space between the3-1^(st) end W3-1 a and the 3-2^(nd) end W3-2 a, and the 2-2^(nd) wiringW2-2. Through this configuration, the second pixel electrode PE2 has ashape approximately parallel to the substrate 100.

As described above, the third bridge wiring BW3 has a convex shape inthe direction (the +x direction) opposite to the direction (the −xdirection) from the 3-1^(st) wiring W3-1 and the 3-2^(nd) wiring W3-2 tothe 2-1^(st) wiring W2-1. Therefore, it is preferable that a virtualstraight line connecting the 3-1^(st) wiring W3-1 to the 3-2^(nd) wiringW3-2 passes below one side of the second pixel electrode PE2 in thedirection (the +x direction) opposite to the direction (the −xdirection) to the 2-1^(st) wiring W2-1 or the direction (the +xdirection) opposite to the direction (the −x direction) to the 2-2^(nd)wiring W2-2, with respect to the center of the second pixel electrodePE2. Through this configuration, a total length of the third bridgewiring BW3 may be minimized.

In the illustrated exemplary embodiment of the display device, the1-1^(st) wiring W1-1 may include, for example, the data line, and the2-1^(st) wiring W2-1 may include, for example, the power line. That is,the 1-1^(st) wiring W1-1 may include a data line which transfers a datasignal to a pixel in which the first pixel electrode PE1 is disposed,and the 2-1^(st) wiring W2-1 may include a power line which suppliespower to a pixel in which the first pixel electrode PE1 is disposed. Thefourth wiring W4 disposed between the 2-1^(st) wiring W2-1 and the3-1^(st) wiring W3-1 may include, for example, a data line, and the3-1^(st) wiring W3-1 may include, for example, the power line. That is,the fourth wiring W4 may include a data line which transfers a datasignal to a pixel in which the second pixel electrode PE2 is disposed,and the 3-1^(st) wiring W3-1 may include a power line which suppliespower to a pixel in which the second pixel electrode PE2 is disposed.

However, the invention is not limited thereto. In an exemplaryembodiment, the first pixel electrode PE1 may be electrically connectedto the second bridge wiring BW2, and the second pixel electrode PE2 maybe electrically connected to the third bridge wiring BW3, for example.In this case, the wiring to which the first pixel electrode PE1 iselectrically connected through the second bridge wiring BW2 may not be adata line or a power line and may be a wiring connected to one of asource electrode and a drain electrode of a TFT. In an alternativeexemplary embodiment, the wiring to which the first pixel electrode PE1is electrically connected may be one of the source electrode and thedrain electrode of the TFT. In this case, the TFT may include a drivingTFT or an emission control TFT. A wiring to which the second pixelelectrode PE2 is electrically connected through the third bridge wiringBW3 may not be a data line or a power line and may be a wiring connectedto one of a source electrode and a drain electrode of a TFT. In analternative exemplary embodiment, the wiring to which the second pixelelectrode PE2 is electrically connected may be one of the sourceelectrode and the drain electrode of the TFT.

In this case, a second via hole and a third via hole are defined in thesecond planarization layer 142, which is the 2-2^(nd) insulating layer.The second via hole is defined over the second bridge wiring BW2, andthe third via hole is defined over third bridge wiring BW3. Therefore,the first pixel electrode PE1 may contact the second bridge wiring BW2through the second via hole, and the second pixel electrode PE2 maycontact the third bridge wiring BW3 through the third via hole.

When the first pixel electrode PE1 contacts the second bridge wiring BW2through the second via hole, and the second pixel electrode PE2 contactsthe third bridge wiring BW3 through the third via hole, the locations ofthe via holes may correspond to outer edges, not emission areas of thepixel electrodes. Furthermore, as shown in FIG. 18 , which is a planview of another exemplary embodiment of a portion of the display device1, the first pixel electrode PE1 may include protrusions protruding inthe +x direction and the +y direction and contact the second bridgewiring BW2 through the second via holes defined in places where theprotrusions are disposed. In addition, the second pixel electrode PE2may include protrusions protruding in the +x direction and the −ydirection and contact the third bridge wiring BW3 through the third viaholes defined in places where the protrusions are disposed. Like thefirst pixel electrode PE1, the third pixel electrode PE3 may includeprotrusions protruding in the +x direction and the +y direction andcontact a bridge wiring corresponding thereto through the via holesdefined in places where the protrusions are disposed. For reference, inFIG. 18 , all via holes are represented by a reference character VH, forconvenience of description.

To allow the first pixel electrode PE1 not to be inclined with respectto the substrate 100, a top surface of the second planarization layer142 is made to have an approximately flat shape between the 1-1^(st) endW1-1 a and the 1-2^(nd) end W1-2 a by making the 1-1^(st) end W1-1 aapart from the 1-2^(nd) end W1-2 a, and a top surface of the secondplanarization layer 142 is made to have an approximately flat shapebetween the 2-1^(st) end W2-1 a and the 2-2^(nd) end W2-2 a by makingthe 2-1^(st) end W2-1 a apart from the 2-2^(nd) end W2-2 a. To allow thesecond pixel electrode PE2 not to be inclined with respect to thesubstrate 100, a top surface of the second planarization layer 142 ismade to have an approximately flat shape between the 3-1^(st) end W3-1 aand the 3-2^(nd) end W3-2 a by making the 3-1^(st) end W3-1 a apart the3-2^(nd) end W3-2 a. For this purpose, it is desired that an orthogonalprojection image of the first pixel electrode PE1 onto the substrate 100does not overlap an orthogonal projection image of the first bridgewiring BW1 and the second bridge wiring BW2 onto the substrate 100. Inaddition, it is desired that an orthogonal projection image of thesecond pixel electrode PE2 onto the substrate 100 does not overlap anorthogonal projection image of the third bridge wiring BW3 onto thesubstrate 100.

According to the exemplary embodiments, the display device in which adegree of the occurrence of a color band by external light reflectionmay be reduced may be implemented. The scope of the invention is notlimited by this effect.

It should be understood that embodiments described herein should beconsidered in a descriptive sense only and not for purposes oflimitation. Descriptions of features within each embodiment shouldtypically be considered as available for other similar features in otherexemplary embodiments. While one or more embodiments have been describedwith reference to the drawing figures, it will be understood by those ofordinary skill in the art that various changes in form and details maybe made therein without departing from the spirit and scope of theinvention.

What is claimed is:
 1. A display device comprising: a 1-1^(st) wiringdisposed over a first insulating layer, extending in a first directionand including a 1-1^(st) end at an end portion thereof in the firstdirection; a 1-2^(nd) wiring disposed over the first insulating layer,extending in a second direction opposite to the first direction, andincluding a 1-2^(nd) end which faces the 1-1^(st) end, the 1-2^(nd) endbeing apart from the 1-1^(st) end; a second wiring disposed over thefirst insulating layer, extending in the first direction to correspondto the 1-1^(st) wiring and the 1-2^(nd) wiring, the second wiring beingapart from the 1-1^(st) wiring and the 1-2^(nd) wiring; a first bridgewiring disposed on a layer different from the first insulating layer,contacting the 1-1^(st) wiring and the 1-2^(nd) wiring, electricallyconnecting the 1-1^(st) wiring to the 1-2^(nd) wiring, and having aconvex shape in a direction opposite to a direction from the 1-1^(st)wiring and the 1-2^(nd) wiring to the second wiring; a third wiringdisposed over the first insulating layer such that the second wiring isbetween the third wiring and 1-1^(st) wiring, the third wiring extendingin the first direction and corresponding to the 1-1^(st) wiring and the1-2^(nd) wiring; a first pixel electrode including a first side and asecond side, the first side being disposed above the second wiring in across-sectional view and overlapping the second wiring in a plan view,the second side being disposed above a space between the 1-1^(st) endand the 1-2^(nd) end in the cross-sectional view and overlapping thespace between the 1-1^(st) end and the 1-2^(nd) end in the plan view;and a second pixel electrode including a first side and a second side,the first side being disposed above the third wiring in thecross-sectional view and overlapping the third wiring in the plan view,the second side being disposed above a space between the second wiringand the third wiring in the cross-sectional view and overlapping thespace between the second wiring and the third wiring in the plan view.2. The display device of claim 1, wherein the first pixel electrode iselectrically connected to the second wiring, and the second pixelelectrode is electrically connected to the third wiring.
 3. The displaydevice of claim 1, further comprising: a 2-1^(st) insulating layercovering the 1-1^(st) wiring, the 1-2^(nd) wiring, the second wiring,and the third wiring; and a 2-2^(nd) insulating layer over the 2-1^(st)insulating layer, wherein the first bridge wiring is between the2-1^(st) insulating layer and the 2-2^(nd) insulating layer.
 4. Thedisplay device of claim 3, wherein a 2-1^(st) via hole and a 3-1^(st)via hole are defined in the 2-1^(st) insulating layer, the 2-1^(st) viahole being defined over the second wiring, the 3-1^(st) via hole beingdefined over the third wiring, a 2-2^(nd) via hole and a 3-2^(nd) viahole are defined in the 2-2^(nd) insulating layer, the 2-2^(nd) via holecorresponding to the 2-1^(st) via hole, the 3-2^(nd) via holecorresponding to the 3-1^(st) via hole, the first pixel electrode is incontact with the second wiring through the 2-1^(st) via hole and the2-2^(nd) via hole, and the second pixel electrode is in contact with thethird wiring through the 3-1^(st) via hole and the 3-2^(nd) via hole. 5.The display device of claim 1, further comprising a substrate over whichthe first insulating layer is arranged, wherein an orthogonal projectionimage of the first pixel electrode on the substrate does not overlap anorthogonal projection image of the first bridge wiring on the substrate.6. The display device of claim 5, wherein an orthogonal projection imageof the second pixel electrode on the substrate does not overlap anorthogonal projection image of the second wiring on the substrate. 7.The display device of claim 1, further comprising a second insulatinglayer covering the 1-1^(st) wiring, the 1-2^(nd) wiring, the secondwiring, and the third wiring, wherein the first bridge wiring, the firstpixel electrode, and the second pixel electrode are arranged over thesecond insulating layer such that the first bridge wiring, the firstpixel electrode, and the second pixel electrode do not contact oneanother.
 8. The display device of claim 7, wherein a second via hole isdefined in the second insulating layer over the second wiring and athird via hole is defined in the second insulating layer over the thirdwiring, the first pixel electrode is in contact with the second wiringthrough the second via hole, and the second pixel electrode is incontact with the third wiring through the third via hole.
 9. The displaydevice of claim 7, further comprising a substrate over which the firstinsulating layer is arranged, wherein an orthogonal projection image ofthe first pixel electrode on the substrate does not overlap anorthogonal projection image of the first bridge wiring on the substrate,and an orthogonal projection image of the second pixel electrode on thesubstrate does not overlap an orthogonal projection image of the secondwiring on the substrate.